作为一个屌丝程序员不得不收藏的工具类一 IP获取工具类

最新推荐文章于 2024-10-30 21:57:00 发布

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最新推荐文章于 2024-10-30 21:57:00 发布

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文章标签： web java IP 工具类 class

本文链接：https://blog.youkuaiyun.com/NaXieNianYiShiGuJi/article/details/40819693

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本文介绍了一个实用的Java IP工具类，包括从HttpServletRequest中获取客户端真实IP的方法及获取本机IP地址的功能。该工具类考虑了多种情况，如Nginx等反向代理软件设置的X-Forwarded-For请求头字段。

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import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

/**
 * IP工具类
 * 
 * @author LSM
 * 
 */
public class IpUtil {

	/**
	 * 获取request中的IP地址
	 * 
	 * @param request
	 * @return
	 */
	public static String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		if (ip.equals("0:0:0:0:0:0:0:1")) {
			ip = "本地";
		}
		return ip;
	}

	/**
	 * 获取本机IP
	 * 
	 * @return
	 * @throws SocketException
	 */
	public static String getLocalIp() throws SocketException {
		Enumeration allNetInterfaces = NetworkInterface.getNetworkInterfaces();
		InetAddress ip = null;
		while (allNetInterfaces.hasMoreElements()) {
			NetworkInterface netInterface = (NetworkInterface) allNetInterfaces
					.nextElement();
			Enumeration addresses = netInterface.getInetAddresses();
			while (addresses.hasMoreElements()) {
				ip = (InetAddress) addresses.nextElement();
				if (ip != null && ip instanceof Inet4Address) {
					return ip.getHostAddress();
				}
			}
		}
		return null;
	}

	/**
	 * 获取本机IP
	 * 
	 * @return
	 * @throws SocketException
	 */
	public static String getLocalIp(){
		InetAddress address = null;
		try {
			address = InetAddress.getLocalHost();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		return address.getHostAddress();
	}
	
}